Burger King Impossible Burger Protein | Grams Per Sandwich

The Burger King plant-based Whopper-style sandwich lists 25 g of protein per serving, with add-ons and swaps shifting the total.

You’re here for one thing: the protein number. Not the hype. Not the vibe. Just the grams, and what makes them move up or down.

Burger King’s plant-based option most people mean in this search is the IMPOSSIBLE™ WHOPPER®. It uses an Impossible Foods patty, then the bun, veggies, sauces, and any add-ons do the rest.

Let’s pin down the official label value first, then get practical on what happens when you change the order.

What Burger King Lists For Protein

On Burger King’s published nutrition PDF, the IMPOSSIBLE™ WHOPPER® Sandwich shows 25 g of protein per serving. That’s the number you can treat as the baseline for a standard build. Use it as your anchor when you compare orders or track macros.

That same PDF is also where you’ll see the rest of the nutrition panel (calories, sodium, carbs, fat). If you’re logging, use the PDF entry that matches your country and menu name when possible, since menus and builds can differ by market.

Reference: Burger King nutrition PDF.

Where The Protein Comes From In This Burger

The biggest slice of protein comes from the plant-based patty itself. Impossible Foods lists 19 g of protein per 4 oz serving of its Impossible Burger patty. That’s the patty-level number, not the whole sandwich number.

Once you stack the patty into a Burger King build, you pick up extra protein from the bun and toppings. You can also add cheese or a second patty, which pushes the total higher.

Reference: Impossible Foods nutrition facts FAQ.

Burger King Impossible Burger Protein With Toppings

Here’s the part that trips people up: the protein number you see online can shift because the build shifts. Mayo on or off. Cheese on or off. Extra patty. Extra bun. Even a “no bun” swap if your store supports it.

So use this rule: start with the official 25 g for the standard IMPOSSIBLE™ WHOPPER® build, then adjust based on the add-on that changes protein.

• Extra patty: biggest jump in protein.
• Cheese: moderate bump.
• Swap sauces or remove mayo: tiny change to protein, bigger change to calories and fat.
• Remove bun: protein drops a bit, carbs drop a lot.

How To Read Protein Numbers Without Getting Burned

Protein on labels is listed in grams per serving. Percent Daily Value for protein may show on some labels and menus, and it’s tied to a Daily Value of 50 g for adults and kids age 4+. That DV is a labeling reference, not a personal target for every body.

If you see “%DV protein” on a screen, you can convert it back to grams by using the same 50 g DV basis. The FDA’s Daily Value reference table lists protein at 50 g. See: FDA Daily Values for nutrients.

One more nerdy note: the legal reference for the 50 g protein Daily Reference Value used for labeling is also spelled out in federal regulation. See: 21 CFR 101.9 nutrition labeling (protein DRV).

Protein Reality Check: What You’re Really Getting At The Counter

When you order at a drive-thru, you’re buying a specific sandwich build, not a nutrition concept. The label number assumes a standard build and portion size.

So the cleanest way to treat protein here is: “This standard sandwich is 25 g protein.” Then you keep your edits consistent if you care about precision.

If your goal is “high protein per bite,” you also want to watch the stuff that adds bulk without adding much protein. Bun and sauces fill space. Patty and cheese carry more protein.

What Changes The Protein The Most

Protein is tied to the amount of protein-rich food you keep in the order. That’s the patty, then cheese, then bun.

So if you want a higher protein total from this menu item, your first lever is the patty count. Your second lever is cheese. Your third lever is side choices that add protein on their own.

What Changes Calories More Than Protein

Mayo and similar sauces add calories far faster than they add protein. That does not make them “bad.” It just means they’re not your protein lever.

If you’re tracking macros, it’s common to keep the patty as-is and tune sauces based on your calorie goal.

Protein Numbers By Common Order Builds

The table below starts with Burger King’s listed value for the standard sandwich. Rows that add protein use a “best estimate” method based on the patty’s 19 g protein listing plus typical add-on behavior, since Burger King’s PDF is the gold standard for exact totals on the base build.

If you need a single, official number to log today, log the standard build at 25 g protein.

How To Order For Your Goal Without Overthinking It

If you’re picking this burger mainly for protein, you’ve got two sane paths. One is “log the standard build and move on.” The other is “make one clean change that you can repeat every time.”

Repeatable beats perfect. A consistent order makes tracking and progress easier.

If You Want More Protein

Ask for a second patty if your store offers it. That’s the clearest way to drive protein up with one change.

If you can’t do a second patty, add cheese. It’s a smaller bump, still a bump.

If You Want Protein With Fewer Calories

Keep the patty. Trim the sauce. “No mayo” is the classic move here, since it cuts calories with little impact on protein.

If your store will do “no bun” or “lettuce wrap,” that can help if carbs are the part you’re trimming. Protein drops a bit too, since bread has some protein, so check your log style before you commit.

If You Want A Vegetarian Order That Still Fits Your Rules

Many people treat this sandwich as vegetarian by default because the patty is plant-based, while mayo makes it non-vegan. Another note: Burger King has stated in various markets that plant-based patties may be cooked on the same broiler as beef. If cross-contact is a concern for you, ask in-store for the option your location can offer.

Protein-wise, that cooking detail does not change the label grams. It’s a personal preference and ordering decision.

Protein In Context: Is 25 g A Lot For One Meal?

For many adults, 25 g in one sandwich is a solid chunk of daily intake. Label Daily Values use 50 g protein as a reference for adults and kids age 4+. That means 25 g is half of that reference amount.

Still, your own daily target can be higher or lower. Training, body size, and goals all change what “enough” looks like. The label DV is still useful as a quick yardstick on menus and packaging.

Common Reasons Your Logged Protein Doesn’t Match What You Ate

If you’ve ever logged “Impossible Whopper protein” and then saw a different number on another site, you’re not alone. Most mismatches come from one of these:

• Different sandwich build: cheese, bacon-style add-ons, sauces, or bun changes.
• Different market: US vs Canada vs another country can mean different builds and nutrition sheets.
• Third-party database drift: sites copy old values and keep them after menus change.
• Patty-only vs sandwich: 19 g per patty is not the same thing as 25 g for the full sandwich.

Best Practice For Logging

If you want accuracy, use Burger King’s published nutrition file for the exact menu item name you ordered. That keeps you off the guesswork treadmill.

If you want speed, log the baseline 25 g protein for the standard sandwich and keep your order consistent.

Practical Tweaks That Keep Protein High

You can keep the taste you like and still keep protein front-and-center. The trick is picking tweaks that change protein, not just calories or volume.

Quick Takeaways You Can Act On Today

If you want one clean answer: Burger King’s nutrition PDF lists the standard IMPOSSIBLE™ WHOPPER® at 25 g protein per serving.

If you want to push that higher, the move is extra patty first, cheese second. If you want fewer calories without giving up protein, “no mayo” is the simple call.

When you see a different protein number online, check whether you’re looking at patty-only data (19 g) or sandwich data (25 g), and check whether the build matches what you ordered.

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